Fix memory leak in partitioned data

src/datawizard/filters.c

@@ -489,6 +489,8 @@ void starpu_data_unpartition(starpu_data_handle_t root_handle, unsigned gatherin
 		_starpu_spin_unlock(&child_handle->header_lock);
 		_starpu_spin_destroy(&child_handle->header_lock);
 
+		_starpu_data_clear_implicit(child_handle);
+
 		STARPU_PTHREAD_MUTEX_DESTROY(&child_handle->busy_mutex);
 		STARPU_PTHREAD_COND_DESTROY(&child_handle->busy_cond);
 		STARPU_PTHREAD_MUTEX_DESTROY(&child_handle->sequential_consistency_mutex);